Angular 2 中多个元素的一键式处理程序 [英] One click handler for multiple elements in Angular 2

问题描述

假设我们有一个 div，里面有 3 个链接.

<a class="link">link1</a><a class="link">link2</a><a class="link">link3</a>

为了在 jQuery 中为链接分配点击处理程序，我们可以这样做:$('.wrap a').on('click', callback);.

Angular2 中最好的方法是什么?

据我所知，我可以对每个链接使用一个简单的(点击)，例如:<a class="link" (click)="callback()">，但对我来说这看起来很奇怪.另一种选择是使用指令并像，我更喜欢这个.

是否有更好的描述案例的实现?

解决方案

click 事件将冒泡到父 div，因此您可以在那里放置事件处理程序.

 
<a id="link1" class="link">link1</a><a id="link2" class="link">link2</a><a id="link3" class="link">link3</a>

 导出类 AppComponent {单击(事件:MouseEvent){console.log(event.srcElement.id);}}

Let's say we have a div with 3 links inside.

<div class="wrap">
    <a class="link">link1</a>
    <a class="link">link2</a>
    <a class="link">link3</a>
</div>

In order to assign a click handler for the links in jQuery we can do smth like this: $('.wrap a').on('click', callback);.

What is the best approach for that in Angular2?

From what I learned I could use a simple (click) for each link, like: <a class="link" (click)="callback()">, but to me it looks odd. Another option would be to use a directive and do smth like <a class="link" [directive]="value">, this one I like more.

Is there an even better implementation of described case?

解决方案

The click event will bubble up to the parent div so you could put a the event handler there.

  <div class="wrap" (click)="clicked($event)">
      <a id="link1" class="link">link1</a>
      <a id="link2" class="link">link2</a>
      <a id="link3" class="link">link3</a>
  </div>

  export class AppComponent {

    clicked(event: MouseEvent) {
      console.log(event.srcElement.id);
    }
  }

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